Kawazulite Mineral Data

General Kawazulite Information

Chemical Formula:

Bi2(Te,Se,S)3

Composition:

Molecular Weight = 728.32 gm

Bismuth 57.39 % Bi

Tellurium 31.54 % Te

Selenium 9.76 % Se

Sulfur 1.32 % S

______

100.00 %

Empirical Formula:

Bi₂Te_1.8Se_0.9S_0.3

Environment:

Of hydrothermal origin, in a quartz vein.

IMA Status:

Approved IMA 1970

Locality:

In the Kawazu mine, Shizuoka Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

For the Kawazu mine, Japan.

Name Pronunciation:

Kawazulite + Pronunciation

Synonym:

ICSD 42543

PDF 29-247

Kawazulite Image

Images:

Kawazulite

Comments: Sparse tin-white metallic kawazulite vein in quartz.
Location: Lone Pine, New Mexico, USA. Scale: Specimen Size 2.5x4 cm.
© Diederik Visser

Kawazulite Crystallography

Axial Ratios:

a:c = 1:6.99528

Cell Dimensions:

a = 4.24, c = 29.66, Z = 3; V = 461.78 Den(Calc)= 7.86

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.12(1), 2.31(0.5), 4.92(0.4),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Nakajima S , Journal of Physics and Chemistry of Solids , 24 (1963) p.479-485, The crystal structure of Bi2Te3-xSex, Locality: synthetic

Physical Properties of Kawazulite

Cleavage:

{0001} Perfect

Color:

Silver white, Tin white.

Density:

7.79

Diaphaneity:

Opaque

Fracture:

Flexible - Flexible fragments.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Metallic

Streak:

steel gray

Optical Properties of Kawazulite

Optical Data:

NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.1772) where Ncalc=Dcalc*KC+1
NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.1772) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong, bluish gray to brownish gray to gray.

RL Pleochroism:

Pinkish creamy white to white with creamy tint.

Calculated Properties of Kawazulite

Electron Density:

Bulk Density (Electron Density)=6.37 gm/cc
note: Specific Gravity of Kawazulite =7.86 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Kawazulite=1,267.95 barns/electron
U=PE_Kawazulite x rElectron Density=8,073.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kawazulite is Not Radioactive

Kawazulite Classification

Dana Class:

02.11.07.05 (02)Sulfides - Including Selenides and Tellurides

(02.11)where Am Bn Xp, with (m+n):p=2:3

(02.11.07)Tetradymite Group (Trigonal: R-3m)

02.11.07.01 Tetradymite Bi2Te2S R 3m 3 2/m

02.11.07.02 Tellurobismuthite Bi2Te3 R 3m 3 2/m

02.11.07.03 Tellurantimony Sb2Te3 R 3m 3 2/m

02.11.07.04 Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m

02.11.07.05 Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m

02.11.07.06 Skippenite Bi2Se2(Te,S) R 3m 3 2/m

02.11.07.07 Vihorlatite! Bi24Se17Te4 P 3m1 3 2/m

Strunz Class:

02.DC.05c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DC -Variable M:S

02.DC.05c Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m

02.DC.05c Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m

02.DC.05c Skippenite Bi2Se2(Te,S) R 3m 3 2/m

02.DC.05c Tetradymite Bi2Te2S R 3m 3 2/m

02.DC.05c Tellurantimony Sb2Te3 R 3m 3 2/m

02.DC.05c Tellurobismuthite Bi2Te3 R 3m 3 2/m

Other Kawazulite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Kawazulite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Kawazulite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Kawazulite Specimen Label here :

Kawazulite

Bi2(Te,Se,S)3
Dana No: 02.11.07.05 Strunz No: 02.DC.05c
Locality:

Notes: